<?PHP 
function LoadJpeg($imgname)
{
    /* Attempt to open */
    $im = @imagecreatefromjpeg($imgname);

    /* See if it failed */
    if(!$im)
    {
        /* Create a black image */
        $im  = imagecreatetruecolor(150, 30);
        $bgc = imagecolorallocate($im, 255, 255, 255);
        $tc  = imagecolorallocate($im, 0, 0, 0);

        imagefilledrectangle($im, 0, 0, 150, 30, $bgc);

        /* Output an error message */
        imagestring($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
    }

    return $im;
}
function imagelinethick($image, $x1, $y1, $x2, $y2, $color, $thick = 1)
{
    /* this way it works well only for orthogonal lines
    imagesetthickness($image, $thick);
    return imageline($image, $x1, $y1, $x2, $y2, $color);
    */
    if ($thick == 1) {
        return imageline($image, $x1, $y1, $x2, $y2, $color);
    }
    $t = $thick / 2 - 0.5;
    if ($x1 == $x2 || $y1 == $y2) {
        return imagefilledrectangle($image, round(min($x1, $x2) - $t), round(min($y1, $y2) - $t), round(max($x1, $x2) + $t), round(max($y1, $y2) + $t), $color);
    }
    $k = ($y2 - $y1) / ($x2 - $x1); //y = kx + q
    $a = $t / sqrt(1 + pow($k, 2));
    $points = array(
        round($x1 - (1+$k)*$a), round($y1 + (1-$k)*$a),
        round($x1 - (1-$k)*$a), round($y1 - (1+$k)*$a),
        round($x2 + (1+$k)*$a), round($y2 - (1-$k)*$a),
        round($x2 + (1-$k)*$a), round($y2 + (1+$k)*$a),
    );
    imagefilledpolygon($image, $points, 4, $color);
    return imagepolygon($image, $points, 4, $color);
}
header('Content-Type: image/jpeg');
$img = LoadJpeg('ground.jpg');
$bgcolor   = imagecolorallocate($img,255,255,255); // white background
$figscolor = imagecolorallocate($img,0,0,255); // blue figures on face
$handcolor = imagecolorallocate($img,0,0,0); // black hands
$seccolor  = imagecolorallocate($img,255,0,0); // red second hand
$imgs =  imagelinethick($img, 320, 320, 600, 500, $bgcolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 700, 600, $figscolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 720, 410, $handcolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 560, 540, $handcolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 220, 400, $figscolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 250, 600, $figscolor , $thick = 2);
$imgs .=  imagelinethick($img, 320, 320, 320, 800, $bgcolor , $thick = 2);
imagejpeg($img);
imagedestroy($img);
?>